Server sizing

We're sizing up a server for a new branch office to serve about 30 people (and is expected to grow to 60 within 3 years). It should be a domain controller, DNS, DHCP, File/Print server running Windows Server 2003 standard.

Our supplier has recommended a HP ML350 G5, with x2 Quad core Xeon E5420 2.5 Ghz and 4GB RAM. Is this overkill? There is a very small chance that this server may need to run a database application to serve 5 users- but this is very small.

What do you think? Are there any good server sizing tools available for this kind of thing?

Two processors is far too much for a file and print server, you really dont need that, even for the database (if its for 5 users). Memory wise.. well its cheap enough so Id stick with the 4gb. As long as you have at least 3 disks in there on at least a raid 5 array Id say go with it, its a good server.

There is a couple of things to consider as well before say if this machine is ok
- How much storage are you putting on the box?
- Will you be running Antivirus (most likely) - if so what is it's requirements?
- Are you going to use VSS on the file shares? If so I recommend at least 1GB for this if you are doing it during the day.

On the whole I agree that 4GB would be the safer option. If you do get 2GB make sure the RAM is configured to allow expansion to 4GB if needed, which should be easy as the machine has 8 RAM slots.

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